Drive transmission device

A drive transmission device comprising:

• a rotatable driving member;
• a rotatable follower member configured to rotate in engagement with said rotatable driving member;
• and
• an elastic member configured to rotate said rotatable follower member by an elastic force when said rotatable follower member is not engaged with said rotatable driving member,
• wherein said drive transmission device transmits a driving force from said rotatable driving member to a driven member via said rotatable follower member,
• wherein a first rotatable member configured to rotate in synchronism with said rotatable follower member and a second rotatable member configured to rotate said driven member by being rotated by said first rotatable member are provided downstream of said rotatable follower member of a driving train for transmitting the driving force from said rotatable driving member to said driven member,
• wherein said first rotatable member includes first and second driving portions configured to drive said second rotatable member and a limiting portion having an arcuate shape concentric with a rotation center of said first rotatable member and configured to limit rotation of said second rotatable member,
• wherein said second rotatable member includes a first driven portion to be driven by said first driving portion, a second driven portion to be driven by said second driving portion, and a contact portion contacting said limiting portion,
• wherein said second driving portion is adjacent to said limiting portion with respect to a rotational axis direction of said first rotatable member, and
• wherein said second driven portion is adjacent to said contact portion with respect to a rotational direction of said second rotatable member.